This edition is a detailed analysis of the social contract theories, as developed by Thomas Hobbes, John Locke and Jean-Jacques Rousseau, as well as the development of utilitarian liberalism as represented by Jeremy Bentham and John Stuart Mill. The theory of state, property, physical and moral freedom, the theory of utilitarianism, the idea of utilitarian democracy, French enlightenment, and the bases of democracy are described in a concise and detailed manner, in this work of high educational value.